Abstract:The development of topography effect correction on resistivity data was summed up.Mainly the correction technique based on angular domain superposition and ratio method was discussed to solve point source and 2-D topography problem. The nature of ratio topography correction was proved and the results were spread to point source. Based on systematicahy studying anomalies of angular domains with different angles,a fast method of topography correction was presented which can be run on personal computer and get resonable accuracy.

Key words: topographic correction  angular domain  cubic spline